APMP.M.H-S3 Final Report Comparison on Hardness ... - BIPM

Revision: <strong>Final</strong> <strong>Report</strong>
Date: May 25, 2012
Annex A Data report forms
<strong>Report</strong> Form 1 (For Rockwell hardness scale A)
Metrology information
Model of hardness primary machine SHT-31
Serial number of hardness primary machine 310039
Manufacturer of hardness primary machine Akashi – Japan
Hardness indication system Laser hologauge
Test force system Lever type
Relative error of preliminary test force +0.01 % (+0.001 kgf)
Relative uncertainty (2) of preliminary test force 0,030 %
Relative error of total test force +0.001 % (+0.0033 kgf)
Relative uncertainty (2) of total test force 0.01%
Uncertainty of depth measuring device 0.2 m
Serial number of the indenter 53495
The tip radius of curvature of the indenter 200m ± 4m
The apex angle of cone of the indenter 120 ± 0.1
The calibration and measurement capability (CMC) 0.38 HRA
Testing condition
Velocity of the indenter when reaching the surface 80-200 m/s
Holding time of preliminary test force 3 s
Test force loading speed 33 s
Total test force duration time 4 s
Time before reading permanent indentation depth 4 s
Environment of comparison measurement
Measurement place Hardness lab. NIMT
Measurement date 28-29 April 2010
Environment (23±1)C ,(50±10)%RH
Deformation of frame verification
Deformation of frame (m)
1 2 3
0.14 0.14 0.15
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